Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/11891 |
Resumo: | The use of soil-fiber has been recognized as a viable technique of soil improvement in numerous geotechnical applications. However, existing research has not yet established the fundamental mechanisms controlling the behavior of clay-fiber mixtures and the constraints that may affect their performance. On the other hand, there is a growing increase in the development of methodologies for predicting soil-fiber behavior, as well as the use of constitutive models for mixtures based on individual properties soil and fibers. However, few studies have evaluated the effectiveness of the methods available and the peculiarities that may affect the results. In this context, the present work aims to contribute to the understanding of the shear strength and deformability behavior of a clayey soil with the inclusion of short fibers from recycled polypropylene, through unconfined uniaxial compression tests, direct shear strength and triaxial compression (drained and undrained) tests. In addition, the research evaluated the effectiveness of some soil-fiber shear strength prediction methods. This research evidenced that, in all tests, the fibers improved the shear strength of the clayey soil, increasing its ductility and initial stiffness. It was also verified that the interaction mechanisms between the soil and the fibers, and consequently the shear strength of the composite, were not influenced by the drainage condition or by the development of pore water pressures during shearing, since values of effective shear strength at failure in drained condition and undrained condition were similar. Regarding the shear strength prediction methods, both in terms of total and effective stresses, analyses presented few discrepancies in relation to the results obtained experimentally, but it is verified that the soil-fiber interaction coefficients strongly influence the results of predictability and must be analyzed in a more effective way to reduce the discrepancies capitalized in this research. |
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Rocha, Sabrina AndradeCorreia, Natália de Souzahttp://lattes.cnpq.br/2172645507238077http://lattes.cnpq.br/05070442102736165bf27a73-5be7-42ce-af5b-931da1768ea62019-09-26T14:11:25Z2019-09-26T14:11:25Z2019-06-28ROCHA, Sabrina Andrade. Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso. 2019. Dissertação (Mestrado em Engenharia Civil) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11891.https://repositorio.ufscar.br/handle/ufscar/11891The use of soil-fiber has been recognized as a viable technique of soil improvement in numerous geotechnical applications. However, existing research has not yet established the fundamental mechanisms controlling the behavior of clay-fiber mixtures and the constraints that may affect their performance. On the other hand, there is a growing increase in the development of methodologies for predicting soil-fiber behavior, as well as the use of constitutive models for mixtures based on individual properties soil and fibers. However, few studies have evaluated the effectiveness of the methods available and the peculiarities that may affect the results. In this context, the present work aims to contribute to the understanding of the shear strength and deformability behavior of a clayey soil with the inclusion of short fibers from recycled polypropylene, through unconfined uniaxial compression tests, direct shear strength and triaxial compression (drained and undrained) tests. In addition, the research evaluated the effectiveness of some soil-fiber shear strength prediction methods. This research evidenced that, in all tests, the fibers improved the shear strength of the clayey soil, increasing its ductility and initial stiffness. It was also verified that the interaction mechanisms between the soil and the fibers, and consequently the shear strength of the composite, were not influenced by the drainage condition or by the development of pore water pressures during shearing, since values of effective shear strength at failure in drained condition and undrained condition were similar. Regarding the shear strength prediction methods, both in terms of total and effective stresses, analyses presented few discrepancies in relation to the results obtained experimentally, but it is verified that the soil-fiber interaction coefficients strongly influence the results of predictability and must be analyzed in a more effective way to reduce the discrepancies capitalized in this research.O uso de solo-fibra tem sido reconhecido como viável técnica de melhoramento de solos em diversas aplicações geotécnicas. No entanto, as pesquisas existentes não estabeleceram ainda os mecanismos fundamentais que controlam o comportamento de misturas de argila-fibra e as condicionantes que podem afetar seu desempenho. Por outro lado, nota-se também um crescente aumento no desenvolvimento de metodologias de cálculo para previsão do comportamento solo-fibra, bem como uso de modelos constitutivos baseados em propriedades isoladas de resistência do solo e da fibra. Entretanto, poucas pesquisas avaliaram a efetividades dos métodos disponíveis e quais são as peculiaridades que podem afetar os resultados obtidos. Neste contexto, o presente trabalho busca contribuir para o entendimento do comportamento de resistência e deformabilidade de um solo argiloso melhorado com a inclusão de fibras curtas de polipropileno reciclado, por meio de ensaios de compressão uniaxial não confinada, resistência ao cisalhamento direto, bem como resistência à compressão triaxial (drenada e não drenada). Além disso, a pesquisa visou avaliar a efetividade de alguns métodos de previsão de resistência solo-fibra. Esta pesquisa evidenciou, em todos os ensaios, que as fibras melhoram a resistência ao cisalhamento do solo argiloso, aumentam ductilidade e melhoram a rigidez inicial. Verificou-se também que os mecanismos de interação entre o solo e as fibras, e por consequência a resistência ao cisalhamento do compósito, não foram significativamente influenciados pela condição de drenagem ou pelo desenvolvimento de pressões neutra durante o cisalhamento, uma vez que os valores de resistência ao cisalhamento efetivo para a condição de ruptura drenada e não drenada foram próximos. E quanto aos métodos de previsão de resistência ao cisalhamento, tanto em termos de tensões totais como efetivas, apresentaram pouca discrepância em relação aos resultados obtidos experimentalmente, mas verifica-se que os coeficientes de interação solo-fibra influenciam fortemente nos resultados de previsibilidade e devem ser analisados de forma mais efetiva para diminuir as discrepâncias capitadas nesta pesquisa.Não recebi financiamentoporUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Engenharia Civil - PPGECivUFSCarAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessSolo-fibraFibra poliméricaResistência ao cisalhamentoEnsaios triaxiaisMétodos de previsãoSoil-fiberPolymeric fiberShear strengthTriaxial testsPrediction methodsENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICAAvaliação da influência de fibras de polipropileno na resistência efetiva de um solo argilosoEvaluation of the influence of polypropylene fibers on the effective resistance of a clay soilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis6006006c97f8fb-7593-4e6b-a868-9f615da13ea5reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALSabrina Andrade Rocha.pdfSabrina Andrade Rocha.pdfapplication/pdf3681258https://repositorio.ufscar.br/bitstream/ufscar/11891/4/Sabrina%20Andrade%20Rocha.pdf49d31818817a4be3cde856e1aca874feMD54Carta_Aprovacao Sabrina Andrade Rocha.docCarta_Aprovacao Sabrina Andrade Rocha.docCarta de aprovaçãoapplication/msword3697152https://repositorio.ufscar.br/bitstream/ufscar/11891/2/Carta_Aprovacao%20%20Sabrina%20Andrade%20Rocha.doc67d4cbb4608012a7efc889d6b5621d26MD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufscar.br/bitstream/ufscar/11891/3/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD53TEXTSabrina Andrade Rocha.pdf.txtSabrina Andrade Rocha.pdf.txtExtracted texttext/plain228368https://repositorio.ufscar.br/bitstream/ufscar/11891/5/Sabrina%20Andrade%20Rocha.pdf.txt0e33fb5943f0ac19175a87323008a8dcMD55Carta_Aprovacao Sabrina Andrade Rocha.doc.txtCarta_Aprovacao Sabrina Andrade Rocha.doc.txtExtracted texttext/plain1702https://repositorio.ufscar.br/bitstream/ufscar/11891/7/Carta_Aprovacao%20%20Sabrina%20Andrade%20Rocha.doc.txt23a24020fc3ebd6025d2bc23d7d87266MD57THUMBNAILSabrina Andrade Rocha.pdf.jpgSabrina Andrade Rocha.pdf.jpgIM Thumbnailimage/jpeg7235https://repositorio.ufscar.br/bitstream/ufscar/11891/6/Sabrina%20Andrade%20Rocha.pdf.jpg85d19af7a583a5fb34b67683862d243aMD56ufscar/118912023-09-18 18:31:44.845oai:repositorio.ufscar.br:ufscar/11891Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:44Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
dc.title.alternative.eng.fl_str_mv |
Evaluation of the influence of polypropylene fibers on the effective resistance of a clay soil |
title |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
spellingShingle |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso Rocha, Sabrina Andrade Solo-fibra Fibra polimérica Resistência ao cisalhamento Ensaios triaxiais Métodos de previsão Soil-fiber Polymeric fiber Shear strength Triaxial tests Prediction methods ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
title_short |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
title_full |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
title_fullStr |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
title_full_unstemmed |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
title_sort |
Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso |
author |
Rocha, Sabrina Andrade |
author_facet |
Rocha, Sabrina Andrade |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/0507044210273616 |
dc.contributor.author.fl_str_mv |
Rocha, Sabrina Andrade |
dc.contributor.advisor1.fl_str_mv |
Correia, Natália de Souza |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/2172645507238077 |
dc.contributor.authorID.fl_str_mv |
5bf27a73-5be7-42ce-af5b-931da1768ea6 |
contributor_str_mv |
Correia, Natália de Souza |
dc.subject.por.fl_str_mv |
Solo-fibra Fibra polimérica Resistência ao cisalhamento Ensaios triaxiais Métodos de previsão |
topic |
Solo-fibra Fibra polimérica Resistência ao cisalhamento Ensaios triaxiais Métodos de previsão Soil-fiber Polymeric fiber Shear strength Triaxial tests Prediction methods ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
dc.subject.eng.fl_str_mv |
Soil-fiber Polymeric fiber Shear strength Triaxial tests Prediction methods |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
description |
The use of soil-fiber has been recognized as a viable technique of soil improvement in numerous geotechnical applications. However, existing research has not yet established the fundamental mechanisms controlling the behavior of clay-fiber mixtures and the constraints that may affect their performance. On the other hand, there is a growing increase in the development of methodologies for predicting soil-fiber behavior, as well as the use of constitutive models for mixtures based on individual properties soil and fibers. However, few studies have evaluated the effectiveness of the methods available and the peculiarities that may affect the results. In this context, the present work aims to contribute to the understanding of the shear strength and deformability behavior of a clayey soil with the inclusion of short fibers from recycled polypropylene, through unconfined uniaxial compression tests, direct shear strength and triaxial compression (drained and undrained) tests. In addition, the research evaluated the effectiveness of some soil-fiber shear strength prediction methods. This research evidenced that, in all tests, the fibers improved the shear strength of the clayey soil, increasing its ductility and initial stiffness. It was also verified that the interaction mechanisms between the soil and the fibers, and consequently the shear strength of the composite, were not influenced by the drainage condition or by the development of pore water pressures during shearing, since values of effective shear strength at failure in drained condition and undrained condition were similar. Regarding the shear strength prediction methods, both in terms of total and effective stresses, analyses presented few discrepancies in relation to the results obtained experimentally, but it is verified that the soil-fiber interaction coefficients strongly influence the results of predictability and must be analyzed in a more effective way to reduce the discrepancies capitalized in this research. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-09-26T14:11:25Z |
dc.date.available.fl_str_mv |
2019-09-26T14:11:25Z |
dc.date.issued.fl_str_mv |
2019-06-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
ROCHA, Sabrina Andrade. Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso. 2019. Dissertação (Mestrado em Engenharia Civil) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11891. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/11891 |
identifier_str_mv |
ROCHA, Sabrina Andrade. Avaliação da influência de fibras de polipropileno na resistência efetiva de um solo argiloso. 2019. Dissertação (Mestrado em Engenharia Civil) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11891. |
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https://repositorio.ufscar.br/handle/ufscar/11891 |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
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openAccess |
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Universidade Federal de São Carlos Câmpus São Carlos |
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